Question

work at,work on,work in的区别及用法

Answer 1

work on 与work at 可通用，表示“忙于……”。
但在work on sth. 中，sth是work的具体对象；
而在work at sth. 中，sth. 只说明所从事工作的性质，即时间、精力用在某一方面的事情上，而不在于说明正在做什么。如：
He is working on/ at a novel. 他正在专心写一部小说。
They have worked at this subject for many years. 他们从事这项课题的研究已经好多年了。
Bob worked hard on organizing other singers to sing for him for free.
鲍勃积极地组织其他歌唱家为他义务演唱。

work out 算出；解决
①Can you work out how much money it will need? 你能算出需多少钱吗？
②I’ve worked out the problem. 我已解决了这个问题。